Cache-control, is set for both js and css. Only js caches are left. Css never caches. Why?

I built a simple service with node. I set up cache-control:"max-age=30", for js and css, but only js works, css doesn"t work, and css always asks again.
the following is the requested information:
this is the request information for js:
clipboard.png
css:

clipboard.png

Mar.18,2021

Please make good use of search

https://codeshelper.com/q/10.

Chrome cache policy: https://codeshelper.com/q/10.


forgot to mention that it works in Safari, but not in chrome

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